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@niet grens @met @faire IMPROVED -POR CUTTING FILES.

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TO WHOM IT MAY CONCERN: 1

` Be it known that I, ALFRED B. ELY, of Newton, in the State oi"Massachusetts, have invented certain newand useful Improvements inMachinery for Cutting Files, of v'vhich` the following, with theaccompanying drawings, is an accurate description.

Figure 1 is a top 'view of the toolvstock and adjun'cts.

Figure 2 is avertioal sectional view of tool stock and arm.

In the cutting of tiles by handthe shank of the tool is surrounded bythe elastic cushion of skin and flesh, and in strikingthe blow,suilcient play is given to the tool to produce the peculiar out andtooth necessary for a good file. Again, the chisel, by means of thearticulations of th'ejoints, is made to conform'to the surface of the leblank, and also to any required angle of the cut to the blank. Again,the tool is held at the end of a spring-arm. It is the design of myinvention to meet these contingencies.

Ais the tool stock. B is the chisel, its shank passingup through thestock.- C is a lining of rubber within the stock encasingthe shankof thechisel. This lining may be made of leather, preparations of rubber, orany suitable elastic substance. The tool iswseparate from the hammer,and the chisel slips' up and down in the stock, and a strip or stripsofmetal may intervene between the elastic lining and the 'shank to-prevent abrasion. A pin, a, through the shank above the rubber, or anut, will keepthe chisel in place, and theA elasticity of 'therubbe'riwill, when the chisel is struck, act as a spring tobring it backagain, While shoulders\below will prevent its' being driven up into thestock. D is the arm of the tool stock, having a' ball, E, at its end.- FF Yare'two ledges of metal on the rear of' the tool stock, hollowed ontheir inner sides tov form a socketfor the. ball E, the wholevforrning aball and socket-joint, and enabling the tool.v to be turned in anydirection andj-at any angle. Ordinarily it is only necessary that thetool shall turn laterally to the right and left to vcut the propercrossangle of tooth row, and vertically to the right and left to conformto the surface of the blank. G G are springbars pivoted above and belowthe ledgesF F, at H, and bent down and up so as to press upon and claspthe arm D, at I I. If itbe `desired to prevent or limit thedirectvertical V@pand-down) movement of the stock on'the ball E, thebars I I,vor either of them, may be made rigid, in which case it willform a ball and socket limited as to its motions in some directions..The outer edges of the ledges F are made circular, and may be graduated.

The bar G, being pivoted at H, or` at or near the centre-of the toolstock, the stock may be moved either way, and confined at any point onthe arc by a clamp-screw, K. In this way the tooledge may be-setand-held at any angle across the file blank. By means of similar ledgesand bars and clamps on the sides, the' tool may be set at anyinclination over the file blank. A presser-footer adjuster may beattached to the arm and so.con

structed and arranged as to conform to the surface of the file blank,and also to preserve its parallelism to thev chisel, and also to beplaced at such distance to and from the chisel as may be founddesirable. `'Ilie end ofthe arm D is a spring, L, attached to arock-shaft, or pivoted ormade fast at M. The whole arm may beconstructed as a spring. Thev arm may be pivoted orjoiuted so as to movelaterally near the rock-shaft, and turn adversely,

as'the tool-stock is turned, and allow the file to be c'ut withoutchanging the positionof the blank from the centre of the bed; thehammer-arm may be similarly constructed. f

Having thus described my invention, what I claim in file-cuttingmachinery, is- Y 1. Lining the socket and grasping the tool in'the stockorhead with rubber, when the` parts are arranged and constructed andoperate substantially as and for the purposes described. i

2. Connecting the' tool holder or head with the arm or shaft,substantially as described.

3. The spring-arm D, in combination with the rubber-lined head,substantially as described. n

4. The'arrangement of thebars G, with the head and arm, substantially asand for-the purposes described.

5. Regulating the angle of vthe cutting edge of pthe tool to the arm orshaft bymeans of bars and clamps, substantially as described.

6. The combination of the rubber-lined socket with the verticallyswivelling head, substantially as described. 7. The combination of therubber-lined socket with the vertically swiyelling and horizontallyturning head, substantially as described.

In testimony whereof I have' hereunto subscribed my name. i

ALFRED B. ELY.

Witnesses:

J` I. PEYTQN, EDM. F. BBoWN.

